Taking Flight: The 13 Routes That United Airlines Has Added From Its Busiest Hub This Year

Denver is United Airlines’ busiest hub by passengers and seats for sale. However, Cirium Diio data shows that Chicago O’Hare recently overtook the Colorado airport for aircraft movements. The airline’s significance in Denver is despite having less than half of the total capacity, which is because of the strong presence of Southwest and Frontier. It is not a fortress hub for United.